add markdown and jj plugin

[robertluo]

📝 Description

✅ Checklist

• Commits should be cryptographically signed (SSH or GPG)

Practicalli Guidelines

Please follow these guidelines when submitting a pull request

• refer to issues using # followed by the issue number (or paste full link to the issue)
• PR should contain the smallest possible change
• PR should contain a very specific change
• PR should contain only a single commit (squash your commits locally if required)
• Avoid multiple changes across multiple files (raise an issue so we can discuss)
• Avoid a long list of spelling or grammar corrections. These take too long to review and cherry pick.

Submitting articles

Create an issue using the article template,
providing as much detail as possible.

Website design

Suggestions about website design changes are most welcome, especially in terms of usability and accessibility.

Please raise an issue so we can discuss changes first, especially changes related to aesthetics.

Review process

All pull requests are reviewed by @practicalli-johnny and feedback provided, usually the same day but please be patient.

[practicalli-johnny]

From the changes in the commits, I dont believe you intended to create a pull request onto the Practicalli/nvim-astro5 repository.

I will close this pull request.

If you do have changes to suggest, please do let me know. Thank you.